Condenser



Feb. 9 1926. 1,572,244

E. B. NOWOSIELSKI CONDENSER Filed April 12, 1922 ATTORNEY E Patented Feb. 9, 1926.

UNITED; S '1 TE' S PAT ENET OFF l CE EDWARD B. NOWO S IE LSKI, OF BLO0 MFIELD,.1\TEW JERSEY, ASSIGNOR TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY.

CONDENSER;

Application filed April 12,- 1922.

To all whom z'tmay concern Be it known that I, EDWARD B. Nowosrnn- SKI, a citizen of the United States, residing at Bloomfield, in the county of'EsseX, State of New Jersey, have invented'certain new and usefulImprovements in Condensers, of which the following is a description, reference being had to the accompanying drawingandto the figures of reference marked thereon.

This invention relates to a condenser that isparticularly adaptedfor use in connection with radio telephone work. In many of'the sets put up for this service, the apparatus is mounted on panels of wood or moulded insulating material and the apparatus should therefore be capable of being readily mounted.

It is the principal object of my invention to providea condenser which is capable of being-readily mou'ntedand to which an electrical connection can'be made very. easily.

Another object of my invention is to provide a condenser which is'simple in construction and hence cheap to manufacture, at the same time one in'wh'ich the parts will stand considerable abuse in handling.

My invention will be readily understood by reference tothe drawing,- in which Figure 1 is a perspective view on an enlarged scale of a complete condenser;

Figure 2 is a longitudinal section through Fig. 1-;

Figure 3 is a central transverse section through Fig. 1; and

Figure 4c is a view of the condenser element itself.

In the different figures, 1 illustrates a piece of insulating material preferably moulded out of any suitable moulded material such as bakelite. Pieces 1 and 2. constituting the casing of the condenser are exactly alike and each has inserts 3, which are also preferably alike, moulded in both ends thereof. Around the edge of each of the pieces 1 and 2 there is a rim 4 provided, the object of which will be later pointed out. The sides of the pieces 1 and 2 opposite to the rim t are very nearly flat, there being a slight shoulder 5 running around the pieces close to the edge and nearly up to the inserts as indicated at 6 (Fig. 2). When the two pieces 1 and 2 are placed together, a small chamber is thereby formed. by the annular shoulder .5.

Serial No. 551,872.

A condenser element consisting of the usual construction of alternate metallic and dielectric strips is assembled as. shown in Fig. 4-. One set of metallic strips 7 projects beyond the group of dielectrics 8 at one end; these strips terminating as indicated by the dotted line 9. Projecting from the other end of the dielectrics 8 are metallic strips 10 ending at the dotted line'll. Since many condensers for radio telephone work are small in capacity the group of metallic strips and dielectrics is consequently small, there being in the form shown two metallic strips extending beyond the dielectrics 8 at one end and one metallic strip at the other with the necessary dielectrics therebetween and on the outside. The thickness of these condenser elements is slightly more than the chamber formed by the shoulder 5 on the pieces 1 and 2 so that when the elements are placed between the pieces 1 and 2 as shown in Fig. 2 and are clamped together, the necessary pressure is brought to bear on the condenser elements to give therequired result. The. metal strips-7 and 10 have holes 12 therein extending over the inserts 3 through which passes a screw 13 and a special lock nut 141 having slots 15 therein so that they cannot be loosened with a screw driver or a pair of pliers, but only by a special tool that will engage the two notches 15 which. are diametrically opposite.

The rim 4 hasa portion cut out as indicated at 16 for the purpose of receiving terminal clips 17 which make contact with the inserts 3 under the head of the screw 13. The terminal clips 17 have holes 18 which may be used for mounting the condenser or for the reception of any desired terminal connector. Thumb nuts 19 are also provided which engage the upper ends of screw 13. Clips 17 may or may not be used on the bottom member 2 or they may be placed underneath the lock nuts 14:, or they may be used in both places as desired, so that it will be seen that the condenser is capable of having various types of wire connections thereto.

As will be indicated in Figs. 2 and 3 the rims 4 are sufficient in depth so that the heads of the screws 13 are below the plane of the outer edge of the rim, so that in case the condenser is mounted on a metal strip, the heads of the screws will not short circuit the condenser.

It will be obvious that certain of the details may be changed without affecting the nature of-my invention which is covered by the appended claims.

Having thus described what I claim is:

1. In a device of the class described, two pieces of insulation having metallic inserts at each end, condenser elements consisting of metallic and dielectric strips positioned between said two pieces of insulation and having one group of metallic strips in electrical contact with said inserts at one end of the pieces and the other group of metallic strips in electrical contact with the inserts at the other end of said pieces and terminal clamping screws going through said inserts and metallic strips for binding insulating pieces and strips together.

2. In a device of the class described, two similar moulded pieces of insulation having metallic inserts moulded in each end thereof, said pieces of insulation having a slight shoulder around one face thereof forming a shallow chamber when said pieces are put together, condenser elements positioned in said chamber and having one set of metallic strips extending between one pair of said inserts and the other set of metallic strips extending between the other pair of said in serts, a terminal screw passing through said inserts and metallic strips and a nut for said screw to bind said pieces together.

3. In a device of the class described, two similar moulded pieces of insulation having metallic inserts moulded in each end thereof, each piece of insulation having a slight depression on one side and a rim on the other side, condenser elements positioned be tween said pieces in the space made by said depressions but having opposite terminals in electrical contact with said inserts, and binding screws passing through said inserts my invention but having the heads thereof on at least one side below the plane of the rim.

4. In a device of the class described, two similar moulded pieces of insulation having metallic inserts moulded in each end thereof, each piece of insulation having a slight depression on one side and a rim on the other side, condenser elements positioned between said pieces in the space made by said depressions but having opposite terminals in electrical contact with said inserts, said rim having openings cut away adjacent said inserts, terminal clips positioned in said rim openings, clamping screws passing through said clips, inserts and condenser elements and lock nuts engaging said screws to hold all of the parts securely together.

5. In a device of the class described, two pieces of insulation having a protecting rim around one side thereof and inserts at both ends passing all the way through the material within the rim, said rim having openings adjacent said inserts, terminal clips positioned in said openings, condenser elements between said pieces and clamping screws passing through said, clips, inserts and condenser elements with means for engaging the screws to lock all of the parts together.

6. A condenser comprising alternate sheets of metal and dielectric having two clamping pieces of insulating material with a slight depression in one face of each piece whereby a shallow chamber is formed when the pieces are put together, said condenser elements completely enclosed in said chamber, terminal screws passing through said pieces and condenser elements and lock nuts engaging the screws to bind said parts together.

In testimony whereof, I aliix my signature.

EDIVARD l3. NOIVOSIELSKI. 

